/**
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (the "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at http://www.mozilla.org/MPL/
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the
 * specific language governing rights and limitations under the License.
 *
 * The Original Code is ""  Description:
 * ""
 *
 * The Initial Developer of the Original Code is University Health Network. Copyright (C)
 * 2001.  All Rights Reserved.
 *
 * Contributor(s): ______________________________________.
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * GNU General Public License (the  "GPL"), in which case the provisions of the GPL are
 * applicable instead of those above.  If you wish to allow use of your version of this
 * file only under the terms of the GPL and not to allow others to use your version
 * of this file under the MPL, indicate your decision by deleting  the provisions above
 * and replace  them with the notice and other provisions required by the GPL License.
 * If you do not delete the provisions above, a recipient may use your version of
 * this file under either the MPL or the GPL.
 */
package ca.uhn.hl7v2.testutil;

import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.Level;
import org.apache.log4j.PatternLayout;
import org.apache.log4j.WriterAppender;
import org.apache.log4j.spi.LoggingEvent;

public class LogCapturingAppender extends WriterAppender {

	private static String ourLastWarning;
	private static String ourLastError;
	private static boolean ourEnabled;

	public LogCapturingAppender() {
		super();
		setLayout(new PatternLayout(PatternLayout.TTCC_CONVERSION_PATTERN));
		BasicConfigurator.configure(this);
	}

	public static void ensureEnabled() {
		if (!ourEnabled) {
			BasicConfigurator.configure(new LogCapturingAppender());
			ourEnabled = true;
		}
	}

	@Override
	public void append(LoggingEvent event) {
		if (event.getLevel() == Level.WARN) {
			ourLastWarning = event.getRenderedMessage();
		}
		if (event.getLevel() == Level.ERROR) {
			ourLastError = event.getRenderedMessage();
		}
	}

	/**
	 * @return the lastWarning
	 */
	public static String getLastWarning() {
		return ourLastWarning;
	}

	/**
	 * @return the lastError
	 */
	public static String getLastError() {
		return ourLastError;
	}

}
